Hey, people, i need help.I have an lcd, and I am using it in a reaction timer project. What it is SUPPOSED to do is this: The led is off for a random amount of time. When it tuns on, the two players race to press their button as fast as they can. If a foul occurs, then a low tone is played and the lcd shows who fouled. If it is not a foul, the LCD shows who won and what their time was.Here is the code

/* Reaction TimerBy- Racerdude24This is a game where there is an led and two buttons. as soon as the led lights up, the first player to push the button wins. If pushed before that, it is a foul. If won, the lcd shows whoalong with the winner's time. If foul, it shows who.*/// wiring:// ----------------^ means on lcd, ~ means on arduino--------------------

However, if you look at the video, you see that the LCD is not showing any characters. I don't think it is the code, because it worked before. Am I applying too much voltage to it? The Pic shows that I am using 3.3v, but beforehand I was using 5v. Could that have damaged it?

I have no idea what the product number is, I just know it is made by samsung.Some things it says on the back are:*FCT 3135*UC-16202-GNAR5-V97051503*Samsung (logo)*0052A

Remove all of the wires except those going to pins 1, 2, and 3 and then put pressure on the black frame around the glass. If you get the expected single row of blocks then you have a poor connection between the display itself and the PC board. You will notice several places where tabs from that frame protrude through the PC board and you can try twisting them some more to tighten the connection. You may have to melt some solder first.

Also, I have some ribbon cable similar to the type that you are using. Mine does not really make secure contact with the breadboard so that may be an additional problem in your case as well.

Remove all of the wires except those going to pins 1, 2, and 3 and then put pressure on the black frame around the glass. If you get the expected single row of blocks then you have a poor connection between the display itself and the PC board.

Yeah, I tried that, I got the single row SOMETIMES when I pressed it, however the squares looked like there was a line moving from bottom to top when I pressed it.

I used a multimeter to check the resistance between the top of the ribbon and another wire, it was fine.

Your problem is intermittent. At some times it may be fine and at other times not so fine.

Quote

What do you mean by "melt some solder"

Some boards may have the tabs secured by a blob of solder.

Quote

The Pic shows that I am using 3.3v, but beforehand I was using 5v

I forgot about this part. What made you switch to 3.3 Volts? Most LCD modules require at least 4.5 Volts or so and we now know that this one does as well. The data sheet also indicates that pin 3 should typically be at about 0.5 Volts.

What made you switch to 3.3 Volts? Most LCD modules require at least 4.5 Volts or so and we now know that this one does as well. The data sheet also indicates that pin 3 should typically be at about 0.5 Volts.

I changed it back because of the "data sheet" you sent me. I at first I thought that 5v may be overpowering it, so I changed it. Yet it works with neither.